EP1458318B1 - Absorbent article with side flaps mechanically connected to the surface layer - Google Patents

Absorbent article with side flaps mechanically connected to the surface layer Download PDF

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Publication number
EP1458318B1
EP1458318B1 EP02789057A EP02789057A EP1458318B1 EP 1458318 B1 EP1458318 B1 EP 1458318B1 EP 02789057 A EP02789057 A EP 02789057A EP 02789057 A EP02789057 A EP 02789057A EP 1458318 B1 EP1458318 B1 EP 1458318B1
Authority
EP
European Patent Office
Prior art keywords
side flaps
liquid
surface layer
permeable surface
article according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02789057A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1458318A1 (en
Inventor
Solgun Drevik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Hygiene and Health AB
Original Assignee
SCA Hygiene Products AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SCA Hygiene Products AB filed Critical SCA Hygiene Products AB
Publication of EP1458318A1 publication Critical patent/EP1458318A1/en
Application granted granted Critical
Publication of EP1458318B1 publication Critical patent/EP1458318B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/476—Sanitary towels, incontinence pads or napkins characterised by encircling the crotch region of the undergarment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/551—Packaging before or after use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56—Supporting or fastening means
    • A61F13/5605—Supporting or fastening means specially adapted for sanitary napkins or the like
    • A61F13/5616—Supporting or fastening means specially adapted for sanitary napkins or the like using flaps, e.g. adhesive, for attachment to the undergarment

Definitions

  • the present invention relates to an absorbent article, such as a sanitary towel, a panty liner, an incontinence pad or the like, which article has two transverse end edges, two longitudinal side edges, a liquid-permeable surface layer, a liquidtight backing layer, and an absorbent core located between the liquid-permeable surface layer and the liquidtight backing layer, and also side flaps at the longitudinal side edges on both sides of the absorbent core, which side flaps, in a packing position, are folded along bending lines and detachably connected to the liquid-permeable surface layer.
  • an absorbent article such as a sanitary towel, a panty liner, an incontinence pad or the like
  • which article has two transverse end edges, two longitudinal side edges, a liquid-permeable surface layer, a liquidtight backing layer, and an absorbent core located between the liquid-permeable surface layer and the liquidtight backing layer, and also side flaps at the longitudinal side edges on both sides of the absorbent core, which side flap
  • An article with side flaps guarantees the positioning in the briefs and reduces the occurrence of leakage.
  • An example of a document which describes the importance of the attachment of the sanitary towel is EP 0 359 501 .
  • sanitary towels and similar products are often folded for packing and packed.
  • folded for packing means that the side flaps are folded over the product so that they come to lie against the liquid-permeable surface layer in the central part of the product when supplied, and that the product is folded one or more times in the transverse direction or longitudinal direction in order that its size is reduced so that the product is easier to handle.
  • the products are supplied packed, for example multipacked or individually packed.
  • a multipacked product is characterized by a number of products lying side by side, packed in a common outer packing.
  • An individually packed product is characterized by each individual product first being packed in its own packing which is then packed together with further individually packed products to form a larger unit in a common outer packing.
  • Suitable materials for individual packing of the product can consist of, for example, an essentially liquidtight plastic film, a tissue layer or a similar thin flexible material.
  • the common outer packing can consist of, for example, cardboard or plastic.
  • a product folded for packing is considerably smaller and significantly easier for the consumer to store and carry in a bag, trouser pocket or the like. If the products are moreover individually packed, the possibility of keeping the products hygienically is improved, so that they do not become soiled by dirt and dust when they are stored in, for example, a bag, pocket or the like.
  • a further problem can arise in instances when relatively rigid material is used for the side flaps of the product. Incorrect folding of the side flaps may then become lasting, which makes it difficult to fold the side flaps around the edges of the briefs in the crotch area.
  • EP 0 527 171 One way of reducing the problem of side flaps being incorrectly folded during production is described in, for example, EP 0 527 171 .
  • the side flaps are folded down over the liquid-permeable surface layer of the article and are held in place by a skin-friendly adhesive.
  • One disadvantage of the illustrative embodiment described in EP 0 527 171 is the increased cost for the adhesive which is to hold the side flaps in place.
  • Another disadvantage is that it is extremely difficult to control the strength of the adhesive so that the side flap lies sufficiently firmly against the liquid-permeable surface layer of the product. If the side flap is attached too loosely to the liquid-permeable surface layer, it will come loose during manufacture and packing.
  • a further disadvantage of using adhesive as the means of attachment of the side flaps to the liquid-permeable surface layer of the product is that the adhesive areas which remain on the liquid-permeable surface layer after the side flaps have been lifted up from the liquid-permeable surface layer can feel uncomfortable to the consumer as the adhesive area does not have the same surface characteristics as the rest of the upper side.
  • the object of the present invention is to satisfy this need.
  • this object is achieved by virtue of an article of the type referred to in the introduction being characterized in that the side flaps are connected to the liquid-permeable surface layer by a mechanical connection. In this way, the problems associated with previously known articles are eliminated.
  • the mechanical connection consists of punctiform or line-shaped indentations brought about by indenting material from the side flaps into the underlying material of the liquid-permeable surface layer so that a permanent deformation of these materials is brought about in the punctiform or line-shaped indentations.
  • This mechanical connection can be brought about by, for example, a squeezing roller with a number of projecting squeezing means in the form of cold or hot grooves, spikes or needles.
  • Another way of bringing about mechanical tacking is to use ultrasound technology, where the article is fed through a nip consisting of an ultrasound unit and a counter-tool with a number of different projecting squeezing means.
  • ultrasound technology it is advantageous if the articles are relatively thin. Thick articles would require too much energy in order to bring about economic and sufficiently rapid tacking.
  • the tacking points connecting the side flaps to the liquid-permeable surface layer are detachable in such a manner that only a small force is required to free the side flaps from the liquid-permeable surface layer.
  • the strength of the mechanical connection between the tacked-together materials at the tacking points is not to be so great that the materials are torn apart around the tacking points when the tacking points are pulled apart/opened.
  • the squeezing means of the squeezing roller are preferably arranged so as to extend over at least a part of the side flaps and one or more areas between the longitudinal outer edges of the side flaps.
  • the advantage of having the squeezing means of the squeezing roller extend over an area between the longitudinal outer edges of the side flaps is that this guarantees that the side flaps are always tacked even though the folding of the side flaps may vary, that is to say when the distance between the longitudinal outer edges of the side flaps varies between different articles.
  • an article having holes/depressions in the way described above provides more rapid admission of received liquid through the liquid-permeable surface layer on down to underlying material.
  • the tacking is carried out by a squeezing roller with squeezing means which are tapering, for example conical, the most pointed part facing towards the article.
  • the conical squeezing means contribute to the holes/depressions down into the article having a conical appearance with a wider dimension of the hole/depression at the surface of the article and a decreasing dimension into the product.
  • the side flaps of the article are tacked detachably to the liquid-permeable surface layer by a number of rows of successive longitudinal punctiform or dash-shaped indentations arranged over the side flaps in the transverse direction. For the same reason as in preceding embodiments, it is important that the distance between the tacking points and the bending lines of the side flaps does not fall considerably below 10 mm.
  • the embodiments described above can be combined with one another, that is to say that the side flaps of the article are tacked detachably to the surface layer by a number of rows of successive longitudinal punctiform or dash-shaped indentations arranged over the side flaps in the transverse and longitudinal direction in combination with a number of tacking points in a central area in the longitudinal direction of the article. It is also possible for the tacking points to extend diagonally over the side flaps of the article.
  • the side flaps are folded against the liquid-permeable surface layer in such a manner that the longitudinal outer edges of the side flaps overlap one another and that the side flaps are tacked to the liquid-permeable surface layer by tacking points which are common to the side flaps.
  • the tacking points can consist of a number of points arranged in a central area in the longitudinal direction of the article, be in the form of lines over the side flaps in the longitudinal direction our transverse direction, or combine tacking in different directions and patterns.
  • the side flaps of the article are tacked detachably to the liquid-permeable surface layer by at least one tack in the form of a continuous longitudinal line arranged over each side flap.
  • This embodiment provides depressions/ducts in the surface layer of the article on down into underlying absorption material, which contributes to a larger liquid-receiving surface area and a surface structure in which the liquid is allowed to remain a short while before the liquid is absorbed into the absorption material.
  • This illustrative embodiment is less exacting in terms of the stretchability of the component materials because the loading of the material is less as the squeezing area is greater when a continuous squeezing pattern is used compared with the embodiments above where small points or dashes are used.
  • the sanitary towel also has two side flaps 106, arranged one on each side of the absorbent core 104, the side flaps 106, in their unfolded or folded-out configuration, projecting in the transverse direction from each longitudinal side edge 112.
  • the shape and size of the side flaps 106 are such that, during use, they can be folded around the leg openings of the briefs.
  • the side flaps 106 consist of the liquidtight backing layer 103 and the liquid-permeable surface layer 102 which extend outside the absorbent core 104.
  • the side flaps 106 can of course consist of separate shaped material pieces which are attached to the longitudinal side edges 112 of the sanitary towel or of only one of the surface layers.
  • the side flaps 106 of the sanitary towel are folded up against the liquid-permeable surface layer 102 of the sanitary towel and tacked by tacking points 109.
  • Mechanical tacking has been carried out on the sanitary towel in and around the area of the extent of the side flaps in the longitudinal direction and also in the area between the side flaps 106.
  • the tacking points 109 are positioned in areas which are free of means of attachment 107 and protective layers 108. Positioning the tacking points 109 in areas outside the means of attachment 107 and the protective layers 108 is advantageous from the point of view that it is not necessary to take account of or be limited by the materials selected for the means of attachment 107 and the protective layers 108.
  • holes and/or depressions 111 down into the liquid-permeable surface layer 102 remain.
  • depressions/holes 111 of different depths can be obtained. If, for example, a stretchable material is used for the liquid-permeable surface layer 102, this will accompany the tacking tool down into the tacking points 109. If, on the other hand, a rigid material is used for the liquid-permeable surface layer 102, holes will be formed in the liquid-permeable surface layer 102 without the material being drawn down appreciably into the tacking points 109. In the preferred embodiment shown, the holes 111 extend through the liquid-permeable surface layer 102 and on down into the underlying absorbent core 104.
  • Figure 3b shows an enlargement of the tacking points 109 and the holes/depressions 111 of the sanitary towel in order to illustrate what was said in the previous paragraph.
  • the tacking points 409 are preferably to be positioned 5 over the side flap 406 at a distance d from the bending line 416 of the side flap in order that the holes 411 formed through the side flaps 406 during mechanical tacking will end up on the outside of the briefs when the side flaps 406 are folded around the leg openings of the briefs in the crotch area. If the distance d is too small, the holes 411 of the side flaps 406 will lie on that side of the briefs which will be exposed to liquid from the wearer, and the liquid can then penetrate through the holes 411 and give rise to leakage onto the underwear of the wearer.
  • the material selection for the sanitary towel 401 does not differ from that described for the preceding embodiment described in Figures 1-3b .
  • FIG. 5 shows a sanitary towel 501 of essentially the same construction as the sanitary towel in Figures 1-4 .
  • the numbering of the various parts of the sanitary towel in Figure 4 is therefore by analogy with that used in the description of the sanitary towel in Figures 1-4 .
  • the sanitary towel 501 shown in Figure 5 differs from the sanitary towels 101 and 401 described previously in one respect, namely in that the tacking is carried out in a different pattern from that shown in Figures 1-3 and 4 .
  • Figure 6 shows a sanitary towel 601 of essentially the same construction as the sanitary towel in Figures 1-5 .
  • the numbering of the various parts of the sanitary towel in Figure 4 is therefore by analogy with that used in the description of the sanitary towel in Figures 1-5 .
  • the sanitary towel 601 shown in Figure 6 differs from the sanitary towels 101, 401 and 501 described previously in one respect, namely in that the tacking is carried out in a different pattern from that shown in Figures 1-3 , 4 and 5 .
  • Figure 6 shows an example of a sanitary towel 601 where side flaps 606 are folded up against the liquid-permeable surface layer 602 of the sanitary towel and where tacking points 609 have also been positioned over the side flaps 606 in the area of means of attachment 607, protective layers 608 and between the side flaps 606.
  • stretchable materials for the means of attachment 607 for example PSHM (pressure sensitive hot melt)
  • the side flaps 606, for example polyethylene film so that these accompany the tacking tool without any holes being formed, which make it possible for the means of attachment 607 to be exposed, but only depressions 611.
  • a means of attachment 607 is used which is not an adhesive and does not have to be protected by a protective layer 608, it is permissible for holes 611 to be formed during the tacking operation.
  • Figure 8 shows a further variant of the invention where the sanitary towel 801 is of essentially the same construction as the sanitary towel in Figures 1-7 but where the side flaps 806 are tacked down against the liquid-permeable surface layer 802 by at least one longitudinal tack 809 in the form of a continuous line for each side flap 806.
  • the width of the tack 809 is around 1-10 mm, preferably 2-6 mm.
  • Figure 8 shows an example of how tacking lines 809 can be shaped over the sanitary towel.
  • the tacking lines 809 in Figure 8 are shaped like curves which are positioned over the side flaps 806 and curve towards the longitudinal edges 812 of the sanitary towel.
  • the sanitary towel described in Figure 8 has been provided with tacking 809 in the form of lines of the same width along the entire extent of the lines, but it is of course possible to use tacking in the form of lines which are not of uniform width over their extent. It is also possible for tacking in the form of lines to be positioned across the sanitary towel.
  • Figures 9a-9j show further variants of how tacking points or tacking lines 909 can be positioned over the side flaps 906 and the sanitary towel 901 in order to hold the side flaps 906 down against the liquid-permeable surface layer 902 of the sanitary towel 901 and partly to form decorative patterns.
  • the indenting of tacking points, tacking dashes or tacking lines can also be effected by means of an ultrasound unit and a counterstay roller provided with a counterstay pattern corresponding to the desired tacking pattern.
  • ultrasound technology it must be ensured that the energy supplied is not so great that melting of a material or the materials is caused, or use must be made of only non-meltable materials.
  • some fusing of the materials can be permitted; in particular, the liquidtight surface layer can be allowed to melt somewhat without risk of the connection of the side flap to the liquid-permeable surface layer becoming too strong.
  • melting in order to produce easily detachable connections, for example by mixing a small number of melt fibres into fibrous materials. By selecting meltable materials with different melting points, the melting can also be controlled.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP02789057A 2001-12-19 2002-11-13 Absorbent article with side flaps mechanically connected to the surface layer Expired - Lifetime EP1458318B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0104302A SE520687C2 (sv) 2001-12-19 2001-12-19 Absorberande alster med sidoflikar mekaniskt förbundna till ytskiktet
SE0104302 2001-12-19
PCT/SE2002/002069 WO2003051249A1 (en) 2001-12-19 2002-11-13 Absorbent article with side flaps mechanically connected to the surface layer

Publications (2)

Publication Number Publication Date
EP1458318A1 EP1458318A1 (en) 2004-09-22
EP1458318B1 true EP1458318B1 (en) 2012-10-31

Family

ID=20286402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02789057A Expired - Lifetime EP1458318B1 (en) 2001-12-19 2002-11-13 Absorbent article with side flaps mechanically connected to the surface layer

Country Status (8)

Country Link
EP (1) EP1458318B1 (sv)
AU (1) AU2002354357A1 (sv)
CO (1) CO5590877A2 (sv)
MX (1) MXPA04005051A (sv)
PL (1) PL206078B1 (sv)
RU (1) RU2302846C2 (sv)
SE (1) SE520687C2 (sv)
WO (1) WO2003051249A1 (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6151510B2 (ja) * 2012-12-26 2017-06-21 大王製紙株式会社 吸収性物品

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU218747B (hu) * 1990-05-01 2000-11-28 Procter And Gamble Co. Szárnyas egészségügyi betét és eljárás előállítására
DE69628934T2 (de) * 1995-10-24 2004-05-19 The Procter & Gamble Company, Cincinnati Eine die flügel bedeckende schutzhülle für einen absorbierenden artikel
US6589150B1 (en) * 2000-09-05 2003-07-08 Mcneil-Ppc, Inc. Apparatus and method to fold and secure sanitary napkin flaps prior to packaging

Also Published As

Publication number Publication date
RU2302846C2 (ru) 2007-07-20
SE0104302L (sv) 2003-06-20
PL369956A1 (en) 2005-05-02
EP1458318A1 (en) 2004-09-22
SE0104302D0 (sv) 2001-12-19
AU2002354357A1 (en) 2003-06-30
PL206078B1 (pl) 2010-06-30
WO2003051249A1 (en) 2003-06-26
MXPA04005051A (es) 2004-08-19
SE520687C2 (sv) 2003-08-12
RU2004121980A (ru) 2005-06-27
CO5590877A2 (es) 2005-12-30

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